Tooth-shade guide



.April 16, 1929. F H, HELD 1,709,066

1 TOOTH SHADE GUIDE Filed May 21, 1923 5 Sheets-Sheet l April 16, 1929.

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.N reinar ortica lfll. FELD, @I3 PclfllllDElLPIA, PENNSYLANIA, ASSIGNGR T0 THE En'. S. VJI'TE DENTAL MIA,EET'EFACTURIEG CGINEPAHY, t CORPRATION F FENNSYLVANXA.

'ree'rnsiiann einrnn.

Application filed May E21,

M y invention relatos to the art of matching colors or shades et teeth in the human mouth, r

and is particularly directed to that class oit devices by which comparison `may be made 5 with said teeth to determine the plastic toothlling materials best adapted to produce a composition having a color or shade most nearly siinulaeing, the color or shade of the tooth to be `filled or otherwise treated. U The principal objects. oic my invention are to provide a tooth-shade `@guide comprising a shade-blending; chart, having means by which the various plastic materials, or combinations thereof, may conveniently be selected to produce the desired color or shade.

ther objects et my invention are to provide a tooth-shade guidehaving samples each dillering` in colors or shades readily comparable with the natural teeth of the human mouth and so positioned thereon and identiiied as to indicate the colony blend et colors, rcuuisi te to produce the desired shade that will best match the shade of the tooth with which it is to be associated. i

lllurther objects ot my invention are to provide plurality et' plastic compounds which will each by itself produce a basic color or V shade di Vllering; one from the other and represented by the basic color samples disIV )sed 30 u a prculotermined sequence on said `shade blending chart, and which when blended by mining' one with another in equal proportions produce color shades represented by the other samples ot said shade blending chart.

My invention comprehends such an arrangement ot the samples on said chart as to readily indicate the particular plastic eompound, the combina ion of two of said plastic componi-nis in equal proportions, that will produce a plastic composition of the color or shade desired.

invention further includes a toothsh., blending` chart comprising a plurality oil color zones, which are so arranged as te intersect and blend with cach other, and which serve to it ilitate the selection of the samples on the chart.

dpecilically stated, the vtoi-m oic my invention hereinafter described comprises a tooth-shade guide in the form oi a checker board chart, having` samples removably mounted thereon in intersecting;n rows and columns, the transverse columns being consecutively numbered -from leiit to right and the vertical rows being similarly numbered from 1923. Serial NO. 540,321.

top to bottom, said numbers corresponding to the similarly numbered containers et the ditferent basic colored plastic materials or conn pounds, `whereby any selected sample shade tooth of the chart `indicates by a glance at the indicating number or numbers of the interseeting' rows and columns in which said sample is disposed, the particular number ornum- Vbers of the plastic compounds that may be employed in equal proportions to produce a connposition having` the color or shade ott the sample selected.

My invention also includes all ol the various novel :features of construction and arramrement hereinafter more definitely specified. l i

ln the accompanying drawings Figure l is a perspective view et a casing in which the charts are conveniently enclosed; Figi: 2 is a planview of said casing in opened position showing; the body and lid extended in a plane; Fig. 3 is an enlarged fragmentary sectional view of the casing with its lid closed, taken on the line 3-3 in Fig. 2; Fig. d is a fragmentary sectional view similar to F 3 talren on e L') the line -4 in Fig. 2; Fig. 5 is a perspective view ot the sample shadoltooth holder; Fic'. G is a perspective view of the carrier by which the cement nu fiale ire measured and carried to the mixing slab; Fie' T is a fragmentary plan view showing; one unit oif the coinposito chart shown in the lid at the lettdian d sid-e ot lilla. 2 and particularly illustrzdinpi the chart shown at the upper lett-hand cer ner on an enla rn'ed scale, and lfioj. 8 is a plan view oit a iuodii'ied iorm et eh art wherein the color combinations are embodied in a single unit, and divid Jd into color zones. i

In said '"grures, the body l ot the casino; has the lid Q connected therewith by the hinges 3, which, as shown in Figs. 3 and 4c, each comprisespaced parallel pintl-cs 5 and t havine; the intermediate connecting; web 7, whereby the lid may, ift desired, be iolded back so that its outer surface may engage the outer i-:urtace oit the body l, and said body be supported thereon. u

Both the body l and lid 2 ot' the casing; may be covered with any suitable material such as leather' El and when closed ait'ord the inclosed space providing the chamber 9.

l/Vithin the chamber El, the body l is provided with aplurality oi shade-tooth rae/hs l0 havingr Hannes 1l, by which they may be secured to the bedyl, and providing1 the inlet) lll)

substantially parallel therewith, but tending to relatively incline in the direction of their free ends and to bear toward each other. The projection forming the prong or tang 14'is extended outwardly and ydisposed beyond the plane of the tongue 13, being arranged'toenterA the recess 15 inthe shade-tooth 16, as best shown in Fig. t, land to force lthe.

lingual surface of said shade-'tooth against the tongue 13, which by reason of the spring tenslon of said tongue lconveniently contorms to and bears with substantial 'firmness against the back surface ofthe shade-tooth, yet pervi'nitting said'shade-too't'h to be readily with-.

drawn therefromy when it is desired to compare it with the natural teeth of the patient.

As shown in Fig. 2, the uppermost rack is arranged to carry twelve shade-teeth, while A'the remaining rackscarry teeth in decreased numbers, decreasing' byone from the top downward, thus affording a triangular arrangement o the teeth on the chart, so that saidteeth are disposed in transverse and verticalintersecting rows and ,columns, the

transverse rows decreasing by one tooth from the top downward and the vertical columns decreasing by one from the right toward the left. Said vertical columns, as shown in said Fig'. 2, lare, numbered at the top from 1 to 12, 'and the transverse rows are numbered at the right-hand side `from the top downward from 1 to 12. Therefore, the shadeteeth disposed along the diagonal side or hypotenuse of said triangle and forming the lower ends of the vertical rows and left-hand end of the transverse rows of shade-teeth, will be disposed at the intersection ofthe vertical. and' transverse' rows and columns bearing 'the same numeral or symbol or indicia of identification and may be similarly numbered vif desired and constitute a major `diagonal 'of the cheekerboard. For, instance,

the tooth at'the left-hand end of the transverse row, bearing numeral 5, will likewise f be disposed in the vertical column, bearing .the numeral 5. u

f The shade-teeth numbered 1 to 12, forming the major diagonal o r side of the chart,

may be producedyby een'rent materials, whose containers may bear similar identiiieation symbols, and each is so compounded that it will by itself produce one ofthe twelve basic Vcolored, shade-teeth, and may be combined one with another to produce cement of the vcolor" or 'shade of the other shade-teeth of said chart.

. To facilitate the selection of the shadeteeth'which resemble the' teeth ofthe patient to be matched, Va supplemental composite -ehafrt 2O is -provided,vcomprising a plurality of chart uni-ts each 4havi ng sample teeth :rep-

resented thereon and conveniently segregating the teeth into specific color zones. Chart unit 21 which, for convenience of illustration is shown enlarged in Fig. 7, embodies representations of' the sample shade-teeth and inscribed on each, the number or combination ot numbers ot samples indicating the intersecting rows and columns ol sample shadeteeth in which they are included. Chart unit 22 embodies representations of the sample shade-teeth, and shows in solid black those sample shade-teeth of the chart that are purely yellow or a shade of yellow. Chart unit 23 shows in solid black representations of those sample shade-teeth ofthe cha rt that are white or shades ol white. Chart unit 24 similarly indicates those teeth that. are light yellow or shades thereof. Chart unit 25 indicates teeth of a yellowish cast and corresponding shades, and likewise., chart units 2G, 27, and 25), respectively, designate the sample shade-teeth on the chart having brownish shades, greenish shades, yellowish gray shades, and what may lic termed purely gray shades. The blank space of said charts toward their lower left hand corners conveniently provides for the inscriptimi of descriptive notes that may be found desirable, such as shown in Fig. 7.

At the lowermost end ot thc chamber il in the casing body 1, a recel'itacle 30, preferably formed of sheet material is provided. which has the grooves or troughs 31 and 32 respectively arranged to receive, when not inuse, the trial shade-tooth holder 35, shown Vin Fig. 5, and the cement material carrier 36,

shown in Fig. 6.

The shade-tooth holder 35 comprises the handle having its forward end extended obliquely to provide a seat 41 for thesample shade-teeth 1G, and has the spring tang 42 punched outwardly from said seat and provided with the projection or pin 43 whose head 14: is extended through the opening 45, which is termed in said seat by punching the spring tang 42 therefrom. The sample shadeteeth may be removed from the ruck, and engaged with said holder by entering the head #i4 ot' the pin 13 into the slot or recess 15 in the back ot' said sample shade-teeth, whereby the back surface of said sample shade-teeth will engage said seat und he held in frictional contact therewith by the spring tang d2. It will he obvious that when a .sample shade-tooth is rengaged willi this holder. that the operator may conveniently insert it into the patients mouth for close comparison with the natural teeth of the patient.

YThe cement material carrier 36 comprises a cylindrical body having at one end a semiovate form of socket or recess 47 for the reception ci cement material. which may be entered therein and measured thereby, upon the operator forcing the carrier axially into the bottle or container of the cement; material and llo lflt) yrange of toethfcolorsor shades found in Vrows of natural teeth.

2. A tooth-shade blending chart comprising intersecting rows and columns of toothsliade indicating devices, the respective rows and columns of said devices bearing identiiication symbols, and being arranged in color zones each embracing selected rows and 'columns of said devices, and intersecting each other to indicate color combinations coiiespending to a wide range of tooth colors or shades found in natural teeth.

3. A tooth-shade blending chart comprising intersecting rows and columns of toothshade indicating devices, disposed in a triangular arca, and being arranged in color zones each embracing selected rows or' said devices, and intersectingl each other to indicate color combinations corresponding to a wide range of tooth colors or shades 'lound in natural teeth and identifying symbols for said -rows and columns.

i 4:. A tooth-shade blending chart comprising intersecting rows and columns of toothsliade indicating "devices, disposed in a triangular area, the rows and columns extending in one direction being consecutively numbered, and the intersecting rows and columns being'similarly numbered, said devices-being arranged in color zones each eii'ibracing selected rows and columns of said devices, and

.intersecting cach other to indicate color conibinations'corresponding to a wide range ot tooth colors or shades found in natural teeth.

5. Al tooth-shade blending chart comprising intersecting rows and columns of toothshade indicating devices, disposed in an area forming a right-angled triangle, and arranged in color zones each embracing selected said devices, and intersecting` each other to indicate color combinations corresponding to a wide range of tooth colors or` shades found in nature, the devices adjacent vand disposed in intersecting iows in triangular'formation, the devices forming the diagonal side or hypotenu'se' of said t niangle, each f einbodyin(T a deiinitebasic color or shade and formed or a compositionpeculiar to its particular color or shade, the colors or shades of the other devices being produced by combinations of equal portions-of the coinpositions corresponding to the devices in the diagonal side of said chart which lie in the intersecting rows of the selected device.

7. A tooth shade blending chart comprising intersecting rows and columns of tooth y jacent each other in rows and columns, the

devices adjacent to the hypotenuse of said triangular area representing basic colors or shades. while the remainingl devices within the triangular area represent combinations of said basic colors.

9. A color device for determining the selection of two tooth cement materials of standard primary colors in equal proportions whereby to match a given tooth, comprising primary color specimens of the cementmaterials and secondary color specimens each represent-ing a mixture of the cement materials in equal proportions arranged in vertical columns and transverse rows within a triangular area, the vertical columns and transverse rows intersecting in the hypotcnuse of said triangular area, euch of said intersecting rows and columns bearing respective indicia diiiering from that of each other row or column, and indicating the cement mnterial of which a color specimen is located on the hypotenuse.

10; A chart of the class described and containing speciinens of standard priinurv colors and of secondary colors produced by the mixture of equal proportions of said primary colors, said specimens being urraiiged in vertical columns and transverse rows in a triangular area` the primary color specimens being arranged on the hypotcnuse of the triangular area, the secondary color specimens being arranged at the intersections of the vertical columns and transverse rows, and in such order that cach column contains secondary specimens formed by the primary colors of the primary color specimens located therein in mixture with the primary color ot the primary .specimen contained in the row in which the secondary color specimen is located.

In witness whereof, I have hereunto set my hand this eighth day of May, A. D., 1922.

FRED H. FIELD. 

